<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <ul>
            <li v-for="(item,index) in list" :key="item.id">
                <span>{{item.num}}</span>
                <button @click="del(item.id)">删除</button>

            </li>
        </ul>
        <button @click="btnRandom">生成</button>



    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.16/dist/vue.js"></script>

    <script>
        const app = new Vue({
            el: '#app',
            data: {
                list: [],

            },
            methods: {
                btnRandom() {
                    this.list.push({
                        id: +new Date(),
                        num: Math.floor(Math.random() * 20)
                    })

                },
                del(id) {
                    this.list = this.list.filter((item) => {
                        return item.id !== id
                    })

                },
            }

        })





    </script>







</body>

</html>